Knob



FIG. 1 is a perspective view of a knob;

FIG. 2 is a top or bottom side view thereof;

FIG. 3 is a left or right side view thereof;

FIG. 4 is a front view thereof; and,

FIG. 5 is a rear view thereof. 

CLAIM What is claimed is the ornamental design for a knob, as shown and described. 